Single star in the constellation Orion
This article is about k Orionis. Not to be confused with
κ Orionis .
74 Orionis
Observation dataEpoch J2000 Equinox J2000
Constellation
Orion
Right ascension 06h 16m 26.61878s [ 1]
Declination
12° 16′ 19.7909″[ 1]
Apparent magnitude (V)5.04[ 2]
Characteristics
Evolutionary stage
main sequence
Spectral type
F5V[ 3]
U−B color index
-0.02[ 4]
B−V color index
+0.42[ 4]
Astrometry Radial velocity (Rv )+9.17[ 5] Proper motion (μ) RA: +83.102[ 1] mas /yr Dec.: +186.263[ 1] mas /yr Parallax (π)51.1930 ± 0.1907 mas [ 1] Distance 63.7 ± 0.2 ly pc ) Absolute magnitude (MV )3.62[ 2] Details Mass 1.39[ 6] M ☉ Radius 1.3[ 7] R ☉ Luminosity 3.02[ 2] L ☉ Surface gravity (log g )4.34[ 6] cgs Temperature 6,595[ 6] K Metallicity -0.03[ 2] dex Rotational velocity (v sin i )18.8[ 8] Age 2.316[ 6] Gyr Other designations k Ori ,
74 Ori ,
BD +12°1084,
FK5 1169,
GC 8033,
GJ 9207,
HD 43386,
HIP 29800,
HR 2241,
SAO 95476,
CCDM J06165+1216A,
WDS J06164+1216A,
LTT 11823
[ 9] Database references SIMBAD data
74 Orionis is a single[ 10] star in the equatorial constellation of Orion . It has the Bayer designation k Orionis , while 74 Orionis is the Flamsteed designation . This object is visible to the naked eye as a faint, yellow-white hued point of light with an apparent visual magnitude of 5.04.[ 2] light years from the Sun based on parallax ,[ 1] radial velocity of +9 km/s.[ 5] proper motion , traversing the celestial sphere at the rate of 0.204 arc seconds per annum.[ 11]
This object is an ordinary F-type main-sequence star with a stellar classification of F5V.[ 3] [ 6] projected rotational velocity of 18.8 km/s.[ 8] [ 6] mass of the Sun and 1.3[ 7] Sun's radius . Metallicity is near solar,[ 2] [ 2] luminosity of the Sun from its photosphere at an effective temperature of 6,595 K.[ 6]
74 Orionis has two visual companions : component B, with magnitude 12.5 and separation 32.1", and C, with magnitude 9.0 and separation 195.5".[ 12]
References
^ a b c d e f Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties" . Astronomy & Astrophysics 616 . A1. arXiv :1804.09365 Bibcode :2018A&A...616A...1G doi :10.1051/0004-6361/201833051 Gaia DR2 record for this source at VizieR .^ a b c d e f g Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv :1108.4971 Bibcode :2012AstL...38..331A . doi :10.1134/S1063773712050015 . S2CID 119257644 . Vizier catalog entry ^ a b Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I". The Astronomical Journal . 126 (4): 2048. arXiv :astro-ph/0308182 Bibcode :2003AJ....126.2048G . doi :10.1086/378365 . S2CID 119417105 . ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers . 42 (2): 443. Bibcode :2014JAVSO..42..443M . Vizier catalog entry ^ a b Maldonado, J.; Martínez-Arnáiz, R. M.; Eiroa, C.; Montes, D.; Montesinos, B. (2010). "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups". Astronomy and Astrophysics . 521 : A12. arXiv :1007.1132 Bibcode :2010A&A...521A..12M . doi :10.1051/0004-6361/201014948 . S2CID 119209183 . ^ a b c d e f g David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal . 804 (2): 146. arXiv :1501.03154 Bibcode :2015ApJ...804..146D . doi :10.1088/0004-637X/804/2/146 . S2CID 33401607 . Vizier catalog entry ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics . 352 : 555– 562. arXiv :astro-ph/9911002 Bibcode :1999A&A...352..555A . Vizier catalog entry ^ a b De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series . 139 (3): 433. arXiv :astro-ph/0608248 Bibcode :1999A&AS..139..433D . doi :10.1051/aas:1999401 . Vizier catalog entry ^ "74 Ori" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2019-08-08 .^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869– 879, arXiv :0806.2878 Bibcode :2008MNRAS.389..869E , doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal , 129 (3): 1483– 1522, arXiv :astro-ph/0412070 Bibcode :2005AJ....129.1483L , doi :10.1086/427854 , S2CID 2603568 . ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog" . The Astronomical Journal . 122 (6): 3466. Bibcode :2001AJ....122.3466M . doi :10.1086/323920 Vizier catalog entry
